UPDATE 1-Vietnam tanker firm Vitaco shares list from Oct. 9

(For an expanded IPO diary, please click on <VN/IPOMENU>) (Adds the share's starting price on debut)

HANOI, Oct 2 (Reuters) - Vietnam Tanker Company (Vitaco), the transport arm of oil product importer Petrolimex, said on Tuesday it would make its $185.6 million debut on the main stock market next week.

Ho Chi Minh City-based Vitaco said in a statement it would list all its 40 million shares on Oct. 9.

The exchange said Vitaco shares would start trading at 75,000 dong ($4.64), putting the company's value at $185.6 million, up from $158 million based on the unregulated market share price.

Shares in Vitaco, partially privatised in February 2006, stood at 64,000 dong ($3.96) on unofficial markets last week.

Vitaco plans to issue new shares to boost its registered capital by 50 percent to 600 billion dong by the end of 2007.

It will join 115 companies now listed on the exchange, where the VN Index .VNI ended up 1.39 percent at 1,099.48 on Tuesday, taking its rise so far this year to 46 percent. The market's capitalisation is now around $18 billion.

Petrolimex holds a 51 percent stake in Vitaco, which has mainly served its parent firm in the past. Petrolimex imports up to 60 percent of Vietnam's oil products each year.

Oil product transport has been expanding to meet annual consumption growth of 6 percent in Vietnam, which is Southeast Asia's third-largest crude oil producer but is heavily reliant on imported refined products as it lacks refineries.